-29.18% is the change from 939 to 665
Calculation steps:
[( 665 - 939 ) ÷ 939] x 100 = -29.18%
Formula
Percentage change = [(665 - 939) / 939] x 100
Subtract the new number by the original number
665 - 939 = -274
-274 ÷ 939 = -0.29179978700745474
-0.29179978700745474 x 100 = -29.18%